Abstract: The apparatus comprises a tank, having a perforated wall disposed above its bottom, arranged to be flooded with a disinfectant and to have the disinfectant drained therefrom, and arranged to have a laminar flow of germ-free air under pressure directed against the surface of the liquid during draining thereof. A pair of laterally spaced guide rails extend longitudinally through the tank in parallel relation with each other. A plurality of container-working stations and a container-filling station are arranged linearly along the guide rails, each container-working station comprising a pair of mutually displaceable, mirror-reversed mating tool parts, each mounted on a respective guide rail. A pair of webs of thermoplastic material or metal foil, which have already been subjected to a preliminary aseptic treatment, are constantly supplied into the tank for step-by-step displacement along the several container-working stations and the container-filling station.